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Thread: Tassie Oak Burl Platter
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3rd July 2008, 10:39 PM #1
Tassie Oak Burl Platter
This is a work in progress & has links to another thread.
I picked up this bit of burl at the TWWW show in Brissy in May.
It is still a bit damp but it has warped & cracked since it was cut into a blank.
I tried out the new Easywood square tip during the roughing process.
I mounted the blank in my large jaws with the bumpy side out. Picture 1.
Because I had it in the large jaws, I couldn't run it very fast & I tried roughing with the Easywood Rougher square tip & also with my good old Henry Taylor HS1 Superflute.
It took a bit of getting used to, it sharp edge peels the timber off & it quickly wedges under the lip of the retaining screw & bunches up stalling the cut. I have since found that this does not happen at a higher cutting speed.
It was easy to get a very flat profile on the blank but as you would expect, there is a fair bit of tear out. Picture 2.
I switched back to my tried & trusted HT Superflute & found that at the lower speed, I could rough out the blank much faster with a less torn finish but because of the uneven grain in the burl, the surface had lots of ripples from the gouge. Picture 3.
Picture 4 shows the piece reversed into the jaws, cleaned up with the Superflute & a recess was cut for the jaws with my purpose made dovetail scraper.
I then flipped it over again onto a set of jaws expanded into the recess shown in pic 4.
The speed could now be increased so I was able to use the Easywood Rougher tip to quickly shape the bottom of the platter.
The finish off the Easywood is still torn (Picture 5) so I switched back to my good old Superflute & used it rolled over on the side as a shear scraper & cleaned up the torn grain.
To be continued.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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3rd July 2008, 10:46 PM #2
Looking good so far
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3rd July 2008, 10:49 PM #3
Interesting Cliff, keep the pics and commentary coming.
I ordered my tool and tips today, so I will be following your progress.Neil____________________________________________Every day presents an opportunity to learn something new
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3rd July 2008, 10:57 PM #4
First impressions.... positive but reserved at this stage.
I could live without it but, now that I have it, I could find a use for it.
Not good at low speed.
Cuts best at higher speed & forms profiles best by moving it sideways across the piece... IE, plunge it in flat & square & then scan/pan it.
Drag or push it so it cuts on a corner on the very tip of one of the side faces with the front face following the cut profile like rubbing the bevel on a gouge.
I could not have cut such an even profile in picture 5 above with just my gouge alone but, I still needed to clean up the torn grain.
I used the square cutter mounted on the rounded side of the tool holder so the flat was square on the tool rest.
The next step will be to try one of the doomed cutters mounted on the flat side of the tool holder with the round side on the tool rest so it can be rolled over to do a shear scrape.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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3rd July 2008, 11:09 PM #5human termite
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are the square cutters carbide or just hss ,i have been chasind carbide to replace my hss ones that came with the jet multi head scraper i just bought ,it came with a round ,square and teardrop tip ,but they are very soft for hss.......................bob
ps if they are carbide , where did you get tham?, thanks cliff
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3rd July 2008, 11:36 PM #6
Yup, follow the link in my first post.
See also, this thread.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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4th July 2008, 08:58 AM #7human termite
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sheee i,m dumb, thanks cliff...........bob
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4th July 2008, 09:23 AM #8
Watching with interest, Cliff. A hard old piece of Tassie Oak will certainly be a challenge for most tools - especially a burled piece.
Also interesting that you started with "the big jaws" and then mounted it in a more conventional chuck. I've little experience at this stage, but I thought the process usually went the other way?
It would seem that the Square Tip would be very prone to dig-ins judging by the amount it protrudes from the holder base - especially the corners?
WayneDon't Just Do It.... Do It HardenFast!!
Regards - Wayne
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4th July 2008, 09:28 AM #9
Thanks Wayne.
The blank was already roughly round but it had no chuck mount on it.
I could have drilled a hole in it & stuck it on a screw but the start I still hadn't decided which would be top & which would be bottom so I cleaned up the 2 faces & had a look at what the grain, cracks, bark, features were doing before I decided.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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4th July 2008, 11:57 AM #10
Does the tip not require a register? I would have thought with even the smallest amount of vibration that it would work loose and revolve about the screw.
It's looks like it will be a nice bowl..
I know you believe you understand what you think I wrote, but I'm not sure you realize that what you just read is not what I meant.
Regards, Woodwould.
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4th July 2008, 01:02 PM #11
It hasn't come loose yet.
Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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4th July 2008, 03:11 PM #12
Cliff, I'd use the r4 tip, not the square tip for this work.
Is the bar that you are using, round on the bottom, the part that meets the tool rest? If it is, it might be more difficult to use........?
I find the square bar helps keep everything lined up and square to the ways and cutting smoothy.
Did you see this video of the "Finishing Cut" that Craig put up?
[ame="http://www.youtube.com/watch?v=7KrWHEvx4KI&feature=related"]http://www.youtube.com/watch?v=7KrWHEvx4KI[/ame]
Still, this is a "Roughing" tool, and is not designed to replace all the tools in your tool rack!
Cheers!It's a Family thing.....
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4th July 2008, 08:15 PM #13Skwair2rownd
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Tassie Oak
Looking good Cliff!
Thanks for the reminder on the finishing cut Stu.
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4th July 2008, 09:13 PM #14
Cliff,
Given your using a burl it does not surprise me about the tear out. Burl grain [for me] best responds to a very sharp gouge with light cuts for finishing.
I have a home made silver steel gouge that I like to use at this point.
Stu's point about the R4 tip is well taken, look forward to further pics.
So far so good.Inspiration exists, but it has to find you working. — Pablo Picasso
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4th July 2008, 09:34 PM #15
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